Within the ceramic assemblages of this ‘classic’ phase it is possible to recognize a number of regional variations evident in the ﬁne wares which partly reﬂect the basic folk tradition of the region and partly local inventiveness (Figure 3.21). These differences may be used to deﬁne regional groups. Thus in Devon and Cornwall lies the Trevisker group (ApSimon and Greenﬁeld 1972; Parker Pearson 1990), in Dorset, south and west of the Stour, is the South Dorset group, on the Dorset coast at the conﬂuence of the Stour and Avon is the Stour valley group and in Wiltshire and south-east Hampshire is the Cranborne Chase group (Calkin 1964; Ellison 1981). The contemporary pottery of Sussex differs signiﬁcantly enough from the western groups to be considered as a separate South Downs group, and in Essex and Suffolk the Ardleigh group has been distinguished (Erith and Longworth 1960). Other regional groups can be isolated in the Thames valley, the west Midlands and the east Midlands (Burgess 1974, 214-15).